Questions tagged [motor]

An electrical actuator that converts electrical energy into rotational motion or sustained linear motion (linear motor). There are many types of electric motors. If the specific type of motor is known, it is helpful to use or add a more specific tag, such as dc-motor, brushless-dc motor or induction-motor.

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What type of motor is this, and how could the power be limited? [migrated]

I've got a aircondition unit (Wood's Cortina Silent 12K Wifi) that is way to powerful for the intended room. I'm hoping to limit the effect to 75-50% to reduce noise, but I have no idea how this ...
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using LM3915 to switch relay or motor

I am trying to switch either a 12v motor or a relay with the outputs of a LM3915. I have found an answer on this site about using a pnp transistor on the outputs to switch multiple leds. the circuit -...
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3 answers
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How can the energy produced by a generator be fed back to the motor that rotates the generator?

The drawing below shows an induction motor (IM), powered from the grid through a variable frequency drive (VFD). This IM, through a gearbox, rotates a permanent magnet synchronous machine (PMSM) ...
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Running 400 Hz, 380 V spindle motor on 220 V, 3-phase VFD

I just (mistakenly) purchased a 380 V (400 Hz) spindle motor and I have a 220 V, 3-phase VFD. The manufacturer said the winding is a special configuration that performs equally well with either ...
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Problems of optimal commutation depending on number of pole

I am trying to design a three phase 4 pole motor, control with six-step. My problem appears when I draw the commutation to try to see how everything work. First, with a basic three phase 2 pole, there ...
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Groundwater pump star-delta phase voltage confusion

Last time I got good answers for my question here so I came again today. Thanks. 🙏🙏 The problem am facing today is in star delta starting motor. When I connect motor to contactor, in phase to ground ...
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Calculating AC Unit Watts

I'm trying to calculate the watts used from my AC unit. Below I am including my sticker label that's on the AC Unit along with a electrical data sheet I found online for my model. So far this is ...
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How does a system measure the speed of a servo motor using brushes on the commutator?

I have a servo motor with 4 brushes on its commutator. The motor is connected to a controller that enables the user to control the speed and at the same time it has an analog RPM meter which most ...
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Motor voltage spike

The circuit below is used as a relay in order to cut-off the common ground C- and Motor-. In my system, the m otor driver (Motor+,Motor-) is connected in parallel with the supercapacitors (C+,C-.) ...
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Needed input on this circuit. How to measure motor output (+Ve and -Ve) using ADC?

Vin- output of the motor (+5 in one direction and -5V in the reverse direction--motor rotation) Va- is the ADC voltage which will be connected. Will the circuit shown below have any issues? Basically ...
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Is it possible to control a matrix of motors using H-bridges?

I am wondering if it is possible to control a matrix of motors using H-bridges? A design in my mind is shown in the picture. I haven't seen anyone doing something similar, so I am wondering if there ...
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Vending machine motor: simple DC motor with microswitch, one revolution

Long story short, I'm currently trying to understand and control a DC motor with connected microswitch, which gives back one-revolution feedback (don't know how). I tried connecting INA219 current ...
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Relay contact arcing

I use a relay with an 80 amp contact rating to start and run a 1 1/2 hp AC pump motor. The points arc badly and soon become unusable. Is there a way I can add capacitors to the points in this AC ...
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Connecting two motors to one Arduino board

I am making a project where I will be using two different motors. One is a 6V DC pump motor and the other is a servo motor. The two motors are not supposed to operate at the same time. The user will ...
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How can a reed switch be used for high current applications?

I am planning to use a reed switch as a power switch in my underwater robotics project. The switch will be placed between the LiPo battery (16.8V, 20.8Ah) and the load. The load mainly consists of two ...
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LRK BLDC motor analysis

I was trying to do some simple calculations on PM BLDC motor as per this pdf, which was published on femm.info site. Given the widespread use of FEMM software and the reputation I believe what's ...
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What does forward rotation of armature mean?

Does forward rotation of motor mean clockwise or anticlockwise?
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Why would a motor have 100kW in 90kW out?

I might have phrased my question wrong but our lecturer asked us a question about why a motor (or generator I am not sure) would have 100kW in and 90kW out. He proceeded with saying that it had ...
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Flyback diode over BTS7960 motor driver

I am using a BTS7960 24V DC motor driver to drive my 24VDC motor in combination with a microcontroller (PIC16F18875) with a PWM output of 13kHz. It works (almost) fine. When i tell te motor to stop (...
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Using High Power Relays to Actuate an AC Motor

I want to remove the need for contactors in a motor application. Currently we are using a 1.5HP (1.1KW) motor and actuating it via a contactor. I have a PCB I am designing and want to use the ...
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bi-directional motor using SPDT relay and diodes

I have a bi-directional motor that I am trying to control using an SPDT relay. It is only working in one direction when I remove the circuit for the opposite direction, and it is either shorting or ...
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AC single-phase fan motor works (almost well) without start capacitor, but not with the correct capacitor connected?

I have a fan motor from a mobile a/c unit here which stopped working. It is for the fan that blows the warm/hot air trough the a/c condenser (exhaust air). 240V AC motor with a 4uF (+/-10%) 450V ...
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Under FOC control, can current sampling be removed when the inductance of the motor is small?

I have dismantled a micro coreless servo motor produced by SIEMENS and made a copy of it. Then I designed an FOC driver board using single shunt and transplant the FOC algorithm to make a position ...
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What is the suitable battery to power 5 servos?

I have 5 servo motor types of Futaba s3003, I want to run them simultaneously so I'm asking what is the right battery should i use? according to the datasheet: https://www.es.co.th/schemetic/pdf/et-...
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Using an air pump for an pneumatic forearm trainer [closed]

I am attempting to create a forearm training device which looks like this (I don't know what it's called). Can I use this air pump motor with an arduino? It can provide pressure up to 100 kpa, but I ...
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Calculating reduction in electric car range with an additional load

I'm trying to estimate the average range reduction in mileage per hour of use of a constant electrical load within an electric car: Assumptions (Vehicle): $$ Usable \ vehicle \ battery \ capacity \ (...
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Electric Motor unbalanced voltages

Why unbalanced currents are 6 to 10 times voltages unbalanced? Source: Energy management handbook by Steve Doty and Wayne C. Turner Eighth edition ISBN 0-88173-707-0 Published by The Fairmont Press, ...
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Is Stall Current Generally Equal to Inrush Current?

I haven't been able to find a clear or definitive answer on this, and I've been wondering about it for some time, now: Does the peak inrush current of an electric motor equal the peak stall current of ...
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How to determine maximum continuous current on a DC motor?

Is there a good way to determine the maximum continous current a small DC motor can handle without breakdown? I am working with a high school robotics team. They are using a door lock actuator to ...
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How to check for the specification of the motor to lift a certain weight? [duplicate]

I'm trying to figure out how much power, torque and rpm required for a motor to carry 2-3 kg (including his own weight). Also, the speed at which the weight is lifted doesn't really matter as much as ...
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DC motor as a generator [closed]

I was wondering if I could use a simple DC motor to power a small LED and how fast I would need to spin it to do so. I am making a small air-powered engine in school and I kind of want to connect it ...
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1 answer
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Stepper motor doesn't move, just vibrates using DRV8428

This is my first time trying to create a stepper motor driver with my own PCB so apologies if I've missed something super obvious. Anyways, I'm trying to use a DRV8428 (datasheet) to move a stepper ...
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Panasonic AC Servo Motor – Significance of Different Voltage Specs

The Panasonic MSMF012L1S2 is specified as a 200V AC servo motor. The nameplate rating is 3ΦAC 68V (wye config). What is the significance of these different voltage values and how do they relate to ...
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Undesired and unstable rise in output read voltage of sensors when more components attached to Arduino circuit [closed]

I am making a project which has one air pump run by a L293D motor controller, a few solenoid valves running at 6 volts, and sensors. The air pump and the valves are powered through a 6 volt adapter. ...
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What's the minimum duty cycle which can be applied to a brushed DC motor?

I am trying to control the speed of a brushed DC motor by varying its duty cycle. By testing it out, I have found out that for my application it should not go above 60% of its duty cycle, this being ...
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Is a change-over-switch with a VFD dangerous?

We are using a variable frequency drive (VFD) with a compressor. We added a rotary cam changeover switch (600 V/50 Hz, picture is attached) in between the compressor and the motor. The purpose of ...
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Categorising the different types of DC motors; Opinion needed

I'm trying to build an understanding of the different DC motors and their properties. When searching for "Types of DC motors" you'll often find this image: This diagram is great, but I fail ...
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Controlling two DC motors with single driver IC

I've designed a PCB that drives two DC motors with two MC33886 DC motor Driver ICs, controlled by an MCU for PWM and direction. The max. motor current is about 3.5 A. It works perfectly but now I'm ...
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High Voltage DC Motor (AC rectification) Relay, Current Limiting, and Smoothing Capacitor

Looking at controlling a HVDC motor like so - Type DC781 (2) LSG Operates on 6 - 220 VDC 84 ohm terminal - terminal resistance No load speed of 8000 RPM @ 220 VDC - 100 mA Stall current at 220 VDC: 2....
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2 votes
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Mystery small, electric motor: shaft held stationary while motor spins around it

I want to wire this motor to a 3-pin plug. The colors are not standard. Which of these wires is neutral, active and earth. It would be of interest to know what this kind of motor is called? I was ...
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How to measure the consolidated power of two electric motors, operating on separate axles of a 4x4 vehicle?

There may be two scenarios: 1- motors are identical 2- motors are not identical I wish to know about the consolidated power for: 1- maximum power 2- continuous power.
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powering an 18v brushed dc motor from a cordless circular saw with a power supply

First, I'm a carpenter who knows little about electronics. I'm trying to build a miniature table saw from this motor. I tried powering it with the charger adapter and it will spin the motor until I ...
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Is it OK to reduce fan speed by reducing voltage?

I have this air cooler whose speed is just too much even on the lowest speed setting, so I added one more speed controller(or regulator) in series which is basically used to control the ceiling fan ...
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How to choose correct water pump for my hydroponic vertical farm

I am building a hydroponic vertical farm. I have 3 shelves and every shelf has one pipe. Also, I have two motors which are HX6540 and HX2500. Since HX6540 is very powerful, it fills the system very ...
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What is happening when a motor is set to a "high" speed?

When looking at different electrical devices like a blender, vacuum cleaner, fan, or drill, it's common for these devices to have different speed settings like "low" or "high" or ...
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1 vote
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Using a voltage regulator dimmer with a 220V water pump

I am builgin a hydroponics vertical farm. The motor which I bought is too powerful (220V/100W) for my system so I want to reduce its power with using a voltage regulator dimmer. My motor has a ground ...
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An alternative to CADe SIMU

CADe SIMU is a industrial circuit drawning and simulation software. I have troubles with the icons size and some bugs, so I am looking for an alternative to CADe SIMU. I found good softwares to draw ...
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1 vote
1 answer
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Back-EMF Concepts (Confusion)

I am trying to understand the current and EMF relationships in a brushless motor. Can someone tell me if this explanation is correct? Specifically, I'm interested in what is happening as the rotor ...
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2 votes
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1 phase motor supplied with 3 phase supply

Can you run a single phase motor, with run capacitor, rated 220V with a 3 phase supply (220V delta) and without the run capacitor. I mean supplying each wires coming out of the motor with 3 phase 220V ...
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How to measure the output of a ceiling fan controller?

Background: I have an older home automation system that I'd like to use for controlling my gas fireplace (flame and fan separately). Due to the automation system's age (and unknown manufacturing ...
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